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Citation: ZHAO Xin-Mei, WANG Hai-Shui. Crystal Growth and Polymorph Control of L-Glutamic Acid on Self-Assembled Monolayers[J]. Chinese Journal of Applied Chemistry, ;2010, 27(12): 1434-1437. doi: 10.3724/SP.J.1095.2010.00116 shu

Crystal Growth and Polymorph Control of L-Glutamic Acid on Self-Assembled Monolayers

ZHAO Xin-Mei ^a, ,
WANG Hai-Shui ^b

a. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun;
b. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640

Received Date: 2 March 2010
Revised Date: 28 April 2010

In this paper,we report a facile approach to obtain different polymorphs of L-glutamic acid(LGA) by crystallization on self-assembled monolayers of L-cysteine under different pH conditions. The β-glutamic acid crystals with plate-like shape were obtained at pH=2.0 and 2.5,while α-glutamic acid crystals were prepared at pH=3.0 and 4.0.The XRD results show that a small amount of β-glutamic acid crystals appear in α-glutamic acid crystals,and they are probably from the secondary nucleation of the β-form.
- L-glutamic acid,
- self-assembled monolayer,
- polymorph selection,
- pH
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